Stud setter



Jafra. 13, 1931. C, R, LETER 1,788,679

STUD SETTER l Filed Jan. 6, 1930 INVENTOR 7d@ ATTORNEY Patented Jan. 13,711,931 i' CHAR-Las n; termen; or^noonnsrneg-`nmv Yoan; irssreivony Tof eoNsonrrAl'rEn ima- Y Aapplicatimi'ineaJanuary 6,11930. k"'sgnfialiro. 4185938.: y f

1 invention relates to improvements. in stud ySetters or` devicesfor setting Y iihreadedrboresor openings;

Thefoh'ectof thednvention is toprovide. a

Y gstudi setter Whichgissimple in, Construction,

inerqiensivev to make/5'. and more reiiicient in operation than stud setters previously-used.

Another obj ect of. the invention is to provide.y a. stud setter having a. driving clutch 11a-@With resilient Vmeans vfor` maintaining the i' la f relieving the, parts of the.. split nut from unnecessary strain.`

Tn-theseand other en dsthe;inventioncon- 1 thereby.: y

' sis-ts in, the-5 construction and arrangement the* aooompanyingg` drawings the. novell .featurejs being pointed out inthe claims follow- `i ng t l 1e:specification. f In thedrawings;` i.

lFigure ,l .is a transverse verticaly section. of

-a stud, settenconstructed. according; t0 one Sisra sidevlewof oneoffthe jaws 35....ings in` which similar. referenceinumerals f2, so, vthatthe oo llarSf andgthesplit nut embodimenti'of 4the invention 5.

in'.I another position; I

forming: part: of splitnut, andiy Figure is an endvievvoithesame. i Referring` more particularly to the, dravw yrefer to..'lile. parts ii 1 .,the'.y several. igures,' 1 designates; a shank 'having an. angular portion adaptedto he engaged by. a. suitabletool r-4 rotating Lthe. same. The shank l. has Van enlargedendforming. a block or head 2Whi`ch is.;threaded externally for Cooperation with Y l internal threads in the upper endl of. asliell yorY sleeve, 'whereby thehead is adjustably connected. with. the sleeve, Threaded` openings are; provided. in. diametrically opposite l Y lSides. o-the heador: thereception. ofcv-radially arranged` screws 4,. the.. heads. ofy Which engage. vertically elongated.v slots. 5V iny the the head' i Y .studs in of partsthat'rvvill appear frointheifollovving description when. read. in'. conjunction With to. eitherrevolve *or move axially. lovver'y endg. tlieporti'on I2 .merges intoa more oonstrictedpoirionglg a seat 14 fora spring The ignre- 2 isz a Vsimilar` View(Y showing parts ofthe.Y head, Q."is one; member,l 6 off a clutch, the v'othermember mounted-ini the, sleeveg. Thel collar-5. 8 is. adapted to move axially inthesleevef andy has-atransversely y arranged. pivot. 9 therein on which; `are pivotally mounted a pair, of

eXtending.- downwardly .frein the,y pivot', as 'seen in thedraxvings, or, in. the [general diofwliiohisprovidedon theyuplcierrend.ofaeollar.v or ring. 8moValoly .55

jaws 10 and!T 10? arranged in thesleeve.. and i y (suY 'move len-gitudinally. vthe sleelve 8 Witlithei Leollar. 8 ,j andiftlie lovverends. are adapted. toc inlove substantially. radially of the.y sleevel toward and. from eachgothen. such radialf movement loi the jaws being omit-rolled` liyjj the; `interior!-nvvall. ofv thesleeye .3. engaged44 rllhe. memhersIO" and. IOhave compl-- mentary internal threads. at` their. lowerl i ends4 `i'erming theV coIn'plementaryfy parts "of ai split: l nut adapted ftov .engage the .threaded i end ofa^ studi..` 1 1; to. liegset. fini-a threadedk openingin' avvorkpiece. 11?..2 The sleeve 3" has. enlarged.. portion 127 at its upper .end in `Which they. Col lar.' is'. adapted 15.'.y provided between them.'v

spring v15.1' is; eoiledahoutthej aWs lOan'd 10a, and arrangedbetvveenthe seat Maand the collar. 8., andten ds togresiliently' movel the col-r larjinto. o lutohinggengagement With the block mount-edi thereon.v turni; asi.y a. unit with .the

'bloolQQ-. and sleeve.- infone direction, the

partsiof the" clutch .being adapted Vtomove the member. S'to; Vdisengage the clutch 1 when to turn.` therewith;v g

At theflower vend,l the'splitiiut is provided with. aylindrioal bearingsu'ifaoe 16, adapted to. enga'ge.A a` bearing'surface- 1 7 in the `lower .endft-he r'estriete'dfportion'13 ofthe sleeve"vv f 3. d-jaeentatlie bearingsurface 16 isv anin-A f "'vvardly: andf upwardly. inclined portion 18 orminga cam. surface,'Wliiehy in turn terminat-es in a vport 1on l)., sharply inclined 1n- Y `j low the bearing portion 17in which the split n wardly toward the axis ofthe split nnut. Bee

may be closed byr meansofa cap or block 2liA Yseated thereon,A and connected' thereto by means of diametrically varranged studs 25 mounted in tapped openings 1n the capta-nd at their inner ends engaging a circumferential groove 26 in the sleeve 3;,v By this' arrangement, the cap'is adapted to turn freely on the sleeve, and ,1t will be noted that when V'the'bearing surfaces 16 and 17 are in engage- 'Vment, asv seen inlFigure 1,*the parts of the `splitnut are contracted to operative position :and the collar 8 is operatively connected with the block 2 to rotate therewith. I

rlhis position of the parts is maintained nntilthe block 24 reaches the work piece 11a, 'when' further axial` movement of the'k stud Vmoves* the splitl nut and collar 8 axially against the tension of the spring `until the members of the clutch are disengaged and the Vfbearing 16 has simultaneously passedoutpof the bearing surface 1 7, as shown in Figure j kturn relatively to the cap 24 whichengages f the workpiece 11a.

At this time, the block 2 and sleeve 3 may The point where the work piece stops the movement of thesleeve may be varied by changing the thickness of ,the block 241.- The point at which the clutch Vmembers are disengaged maybe varied by adljusting the sleeve on the block 2. If theoperator now raises the` shank and with it the sle eve,ithe lattermoves Arelatively to the s ht ,nut which still engages the stud, ,andk thecam @surface 18 onthe Ynut moves voutwardly on Y' sli-.own in Figure 1.VVV f' 'the cam surface 21 in the sleeve, thus permitting the members of the split nut to expand returnv the split Vnut to the .initial position t will be'noted that by this arrangement of the parts, driving connection between the Vblock 2 and the split nut is broken substan- V tially at the instant when theY bearing sur- `face 16 passes out ofthe restricted portion V17 ofthe sleeve, permitting the nut to .expand and be released from .driving vengagement .with the nut. In other'words, when the driving'connection between the nut 'and the shank breaks by disengagement of the clutch members, the enlarged portion 16 ofthe nut moves from the constri'cted portion ofthe sleeve and pr-lrmits the nut to expand, thus releasing it from driving connection with the stud. VVThe cam 18, however, istill'maintains the threads of the nut in engagement with the threads of the stud, so that movement of the sleeve away from the work piece 11a moves the nut until it can expand sui'iiciently in-the enlarged end of the sleeve to release the stud.

Inoperation, the studto be setis suiiiciently engaged with the work piece to hold it therein, as shown in Fig. 1. The rotating stud setter with the parts of the lclutch engaged under the action of the spring and the enlarged bearing portion of the split nut coniined inthe eonstriot-ed portion of the sleeve or casing to maintain its parts in operative posi-V tion, is threaded on to the stud until'the end of the stud engages the block 29. Further rotation ofthe stud setter turns the stud with it and turns it into the tapped opening in the work piece, the stud setter moving with the stud; until it enga-ges the workpiece.

`When the end of the stud setter engages the work piece, axial movement ofthe casing and the shank is stopped, but they continue to rotate andturn the stud to drive it deeper into the Vwork piece. This further movement of the stud operates to move the split nut and the clutch member onwhich itis mounted automatically against the action ofthe spring to Ydisengage the clutch', and simultaneously the enlarged portion on the split nutpasses into the enlarged partoflthe Vcasing or sleeve 'and releases the stud from turning or driving connection therewith. vThe cam 18 on the nut now engages the restricted-portion of the sleeve and maintains the nut loosely in threaded'engagement with the stud, as-seen in Fig. 2. If the studsetter be'now lifted from the work piece, the stud pulls the nut farther towardv the end of the sleeve and its cam from the lconstricted portion of the "sleeve, which permits the nut to expand into nut has moved from the stud, the spring auto matically returns the parts to the Fig. 1 position. i' and release the stud so'that the tool may be fwithdrawn. As soon as the stud is withdrawn ,from the split nut, thespring y15 operates to If desired, a chamber may be provided between the jaws 10 and 10a 'adj acent the upper end of the split nut, in which is loosely seated a hardened disk 29 adaptedv to operate as a buffer'for the upper lend of the stud to'relieve the jaws from wear and strain.

j It will be noted that by adjusting the sleeve on the block 2, the extent of movement of the p sleeve with the stud before the block 24 engages the work piece 11a maybe varied, thus `varying the extentto which the stud is driven pinto the work piece before the driving con- ;nection through the clutch is automatically broken.

lWhile the invention is described with reference to a. single embodiment thereof, it will be understood that this application is intended to cover such changes or modiiications ,Y movable-to and from engagement with the megeve,

a rotated. member, a clutch member thereon, i of a sleeveon the rotated member,sad sleeve having an enlarged opening and a constricvted f portion adjacent thereto, a pair oij'lpivotedj jaws movable axially Yin said sleeve, a clutch member on saidV jaws adapted Vto 'engagel "the first mentioned 'clutch -member for Q operatively connecting Vthe'jaws to the Y and simultaneously disengage said Vclutch 'e rotated member, a ybearing on 'the jawsmembers, and a cam on the jaws engaging the ing operative to move nutand withit the Y second Vclutch member to disengage 'it fromv driving connection with the vshank and the Y 1 bearing surface of thenutffrom the constricted portion ofjthesleeve to release it :from driving connection with the stud, a cam on Vthe nut adjacent said bearing surfacefor i maintainingthe nut in threaded engagement with thejstudwhenfreleased from driving" Y .y

connection therewith, and resilient means for moving the second clutch member into engagementv with the first mentioned clutch j member.

Inwitness whereof, l have hereunto signed f my name.

GHARLESR. LEiTER. f

sleeve for maintaining interengagement be- V tween them and the stud.

2.' In a stud setter, the. combination'4 with a split nut adapted to engageaJ threaded stud to be' set in a tapped opening in a work piece, .ofy a revoluble sleeve in ,which the nut is 'mounted and which is movable axially with vthe' stud when the latter is setin the work ieee disenga eable means for o erativel e P` a e g connecting the nut with the sleeve to rotate therewith, a bearing member on` the nut adapted yto-engagea constrictedv portion ot y the sleeve when rotatively connected thereto Y toy contract the nut to rotatively engage the stud anddriveit into the Vwork piece, means ).v for stopping movement of the sleeve relative to the work piece when the stud approaches the limit of its 1novement,further movement of the stud operating to move the nut to disengageit from rotatable connection with the sleeve and its bearing member from the constricted portion of thesleeve to release 1t from ydriving'connection with thestud, and inter-i.

engaging means on the nut andthe sleeve for maintaining thenut engaged with the'stud during continuedrelative movement thereof. l Y

3.` In al stud setter, the combination with a.-revoluble shank having a head thereon, a

clutch member on said head, a sleeve mounted ,on saidhead to rotate therewith and having an enlarged opening'and a constricted bearing surface adjacentfthereto, a second clutch member revolubly mounted in said sleeve and,

irst mentioned clutch member, a split nut j' mounted on said second clutch member movable axially therewith and adapted to'engage.

' a threaded stud to be set in a tapped opening 4in a work piece, a bearing surface on the nut Y adapted to engage the lconstrictedbearing i surface in the sleeve when the second clutch member engages the first mentionedl clutch I Y member to be rotated thereby to contract the nut to voperatively engage the stud tov drive.

it into the work piece, means on the sleeve movable into engagement with the work piece when the stud approaches, the'limit of its movement, further movement of the stud be- .55 ik j kL "nog, 

